<template>
    <div>
        <!-- 面包屑导航-->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片布局区域-->
        <el-card>
            <!--警示框区域-->
            <el-alert :closable="false" title="添加商品信息" type="info" center show-icon></el-alert>
            <!--步骤条-->
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!--tabs区域-->
            <el-form label-position="top" :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" >
                <el-tabs v-model="activeIndex" tab-position="left" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                    <!--基本信息-->
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price" >
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类">
                            <el-cascader
                                    expand-triggle="hover"
                                    v-model="addForm.goods_cat"
                                    :options="cateList"
                                    :props="cateProps"
                                    @change="handleChange"></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <!--商品参数-->
                    <el-tab-pane label="商品参数" name="1">
                        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                            <!--复选框组-->
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>

                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <!--商品属性-->
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <!--商品图片-->
                    <el-tab-pane label="商品图片" name="3">
                        <!--action表示图片上传的地址-->
                        <el-upload :action="uploadUrl"  list-type="picture"
                                :on-preview="handlePreview"
                                :on-remove="handleRemove"
                                :headers="headerObj"
                                :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <!--商品内容-->
                    <el-tab-pane label="商品内容" name="4">
                        <!--富文本编辑器-->
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <!--添加商品的按钮-->
                        <el-button type="primary" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>

        <!--图片预览-->
        <el-dialog
                title="图片预览"
                :visible.sync="previewVisible"
                width="50%">
            <img class="previewImg" :src="previewPath">
        </el-dialog>
    </div>
</template>

<script>
    import _ from 'lodash'

    export default {
       data(){
           return{
               activeIndex:'0',
               //添加商品的表单对象
               addForm:{
                   goods_name:'',
                   goods_price:0,
                   goods_weight:0,
                   goods_number:0,
                   //商品所属的分类数组
                   goods_cat:[],
                   //图片数组
                   pics:[],
                   //商品的详情描述
                   goods_introduce:'',
                   attrs:[]
               },
               addFormRules:{
                   goods_name:[
                       {required:true,message:'请输入商品名称',trigger:'blur'}
                   ],
                   goods_price:[
                       {required:true,message:'请输入商品价格',trigger:'blur'}
                   ],
                   goods_weight:[
                       {required:true,message:'请输入商品重量',trigger:'blur'}
                   ],
                   goods_number:[
                       {required:true,message:'请输入商品数量',trigger:'blur'}
                   ],
                   goods_cat:[
                       {required:true,message:'请选择商品分类',trigger:'blur'}
                   ]
               },
               //商品分类列表
               cateList:[],
               //级联选择器的配置对象
               cateProps:{
                   label:'cat_name',
                   value:'cat_id',
                   children:'children'
               },
               //动态参数列表数据
               manyTableData:[],
               //静态属性列表数据
               onlyTableData:[],
               uploadUrl:'http://timemeetyou.com:8889/api/private/v1/upload',
               headerObj:{
                   Authorization:window.sessionStorage.getItem('token')
               },
               previewPath:'',
               previewVisible:false
           }
       },
        created() {
            this.getCateList()
        },
        methods:{
           //获取商品分类的数据
            async getCateList(){
                const {data:res}=await this.$http.get('categories');
                if(res.meta.status!==200) {
                    return this.$message.error('获取商品列表失败！');
                }
                this.cateList=res.data;
                // console.log(this.cateList)
            },
            //级联选择器变化时会触发这个函数
            handleChange(){
                // console.log(this.addForm.goods_cat)
                //控制级联选择器只能选择三级商品
                if(this.addForm.goods_cat.length!==3){
                    this.addForm.goods_cat=[]
                }
            },
            beforeTabLeave(activeName,oldActiveName){
               if(oldActiveName==='0' && this.addForm.goods_cat.length!==3){
                   this.$message.error('请先选择商品分类！');
                   return false;
               }
            },
            async tabClicked(){
                // console.log(this.activeIndex);
                if(this.activeIndex==='1'){
                    //访问 动态参数面板
                    const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}});
                    if(res.meta.status!==200){
                        return this.$message.error('获取动态参数列表失败！');
                    }
                    // console.log(res.data)
                    res.data.forEach(item=>{
                        item.attr_vals=item.attr_vals.length===0?[]:item.attr_vals.split(' ');
                    })
                    this.manyTableData=res.data
                }
                else if(this.activeIndex==='2'){
                    const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
                    if(res.meta.status!==200){
                        return this.$message.error('获取商品属性失败！');
                    }
                    // console.log(res.data);
                    this.onlyTableData=res.data;
                }
            },
            //处理图片预览效果
            handlePreview(file){
                // console.log(file);
                this.previewPath=file.response.data.url;
                this.previewVisible=true;
            },
            //处理移除图片的操作
            handleRemove(file){
                // console.log(file)
                //获取将要删除的图片的临时路径
                const filePath=file.response.data.tmp_path
                //从pics数组中，找到这个图片对应的索引值
                const i=this.addForm.pics.findIndex(x=>x.pic===filePath);
                //调用数组的splice方法，把图片信息对象从pics数组中移除
                this.addForm.pics.splice(i,1);
                // console.log(this.addForm);
            },
            //图片上传成功时调用
            handleSuccess(response){
                // console.log(response);
                //拼接得到一个图片信息对象
                const picInfo={pic:response.data.tmp_path}
                //将图片信息对象push到数组中
                this.addForm.pics.push(picInfo);
            },
            //添加商品
            add(){
                this.$refs.addFormRef.validate(async (valid) => {
                    if(!valid){
                        return this.$message.error('请填写必要的表单项');
                    }
                    //执行添加的业务逻辑
                    //lodash  cloneDeep
                    const form=_.cloneDeep(this.addForm)
                    form.goods_cat=form.goods_cat.join(",");
                    //处理动态参数
                    this.manyTableData.forEach(item=>{
                        const newInfo={
                            attr_id:item.attr_id,
                            attr_value:item.attr_vals.join(' ')
                        }
                        this.addForm.attrs.push(newInfo);
                    })
                    //处理静态属性
                    this.onlyTableData.forEach(item=>{
                        const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals}
                        this.addForm.attrs.push(newInfo);
                    })
                    form.attrs=this.addForm.attrs;
                    // console.log(form)

                    //发起请求，添加商品
                    //商品的名称必须是唯一的
                    const {data:res}=await this.$http.post('goods',form);
                    console.log(res)
                    // if(res.meta.status!==201){
                    //     return this.$message.error('添加商品失败！');
                    // }
                    this.$message.success('添加商品成功！');
                    this.$router.push('/goods');
                })

            }
        },
        computed:{
           cateId(){
               if(this.addForm.goods_cat.length===3){
                   return this.addForm.goods_cat[2]
               }
               return null
           }
        }

    }
</script>

<style scoped>
.el-checkbox{
    margin: 0 10px 0 0 !important;
}
.previewImg{
    width: 100%;
}
.el-button{
    margin-top: 10px;
}
</style>
